Climbing Blind

BBC4, 9pm This film tells the incredible story of Jesse Dufton who, aged four, was diagnosed with a genetic disease that breaks down the retina's cells. By the time he was 30 he could only detect light and had a one to two per cent field of vision. But that hasn't stopped him training for world cup climbing events and attempting to become the first blind person to lead a climb of the Old Man Of Hoy in Orkney, Scotland.